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Finding the Fourth Proportional to 741.68, 1,022.76 and 493.04

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Solution

The fourth proportional to 741.68, 1,022.76 and 493.04 is: 679.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.68 : 1,022.76 = 493.04 : x
  2. Step 2: Convert to fraction form
    741.68/1,022.76 = 493.04/x
  3. Step 3: Cross multiply
    741.68x = 1,022.76 × 493.04
  4. Step 4: Simplify right side
    741.68x = 504,261.59
  5. Step 5: Solve for x
    x = 504,261.59/741.68
  6. Step 6: Final answer
    x = 679.89

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.